CN102077461A - Method for identifying load condition of pump - Google Patents
Method for identifying load condition of pump Download PDFInfo
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- CN102077461A CN102077461A CN200980123790XA CN200980123790A CN102077461A CN 102077461 A CN102077461 A CN 102077461A CN 200980123790X A CN200980123790X A CN 200980123790XA CN 200980123790 A CN200980123790 A CN 200980123790A CN 102077461 A CN102077461 A CN 102077461A
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- pump
- current component
- described method
- arbitrary described
- current
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0049—Detection or prevention of malfunction, including accident prevention
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/083—Liquid discharge or recirculation arrangements
- D06F39/085—Arrangements or adaptations of pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/34—Arrangements for starting
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/08—Drain or recirculation pump parameters, e.g. pump rotational speed or current absorbed by the motor
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/48—Current or voltage of the motor driving the pump
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Textile Engineering (AREA)
- Water Supply & Treatment (AREA)
- Control Of Ac Motors In General (AREA)
- Washing And Drying Of Tableware (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention relates to a method for identifying the load condition of a fluid-delivering, electric motor driven pump of a domestic appliance. The invention is characterized in that the pump is driven by a permanent magnet electric motor which is designed as a synchronous motor, a torque-producing current component iq being used to determine at least one load condition of the pump.
Description
Technical field
The present invention relates to a kind of method of giving the load state send pump by motor-driven fluid of discerning home appliances.
Background technology
Be known in and use emptying pump in the dishwasher with screening electrode motor or single-phase synchronous machine.The motor of these pumps is monophase machines, and described monophase machine is configured for the discrete operations point, and directly applies to mains voltage.Because it is employed principle, that obtains the information relevant and is complexity or difficult with the present load situation of these pumps.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of method, by means of described method, the mode of operation/load state of the pump that is driven by motor (EC motor) of home appliances can be picked out.
According to the present invention, above-mentioned purpose realizes by following feature: pump is by the motor-driven that is implemented as synchronous machine, and wherein, at least a load state of pump is determined by the current component that forms torque.Therefore, according to the present invention, the pump of home appliances passes through to use special motor, promptly for example three-phase permanent encourages synchronous machine drives, and wherein, pump motor preferably activated by means of field directional vector controller.At this, synchronous machine is from having the transducer power supply of three-phase pulse width modulated electrical voltage system, and described three-phase pulse width modulated electrical voltage system can be conditioned aspect frequency, phase place and the amplitude.The software section of being responsible for the generation sinusoidal voltage is called modulator.The motor timer is followed after modulator as the physical unit of the microcontroller that is used to produce pwm signal, and the Drive Module of B6 end level is followed at outlet side then.Space vector with the armature spindle rotation changes with described vector controller.At this, there is into the feedback of form of the conversion in succession of control ring and signal.Under the situation of vector controller, the torque of synchronous machine is only regulated in the d/q conversion by means of the q component of stator current, and the vanishing ideally of d component.The target of the three-phase voltage system that the use of current measurement, motor model, synchronous machine utilization can be regulated aspect frequency, phase place and amplitude as mentioned above activates and produces closed control ring.This intrasystem current component iq is directly corresponding with the load state of pump.Therefore, can release from the electric current change procedure of current component iq by the loading condition of the pump of synchronous machine drives.
Especially, load state is determined by the time progress of current component iq.
According to an improvement of the present invention, the loading condition of pump, the no-load condition of pump, the fluid stream that passes through pump of obstruction and/or the Fluid Volume of pumping are determined as load state.If home appliances for example is a dishwasher, then it is discharged by means of so-called emptying pump.This with fluid, be that water is sent out from described dishwasher fully, but under the situation of before dishwasher, continue under idle mode, to move, and in this pattern, produce the loss of the noise and the electricity of higher level, and without any other benefit.If discharging hose gets clogged in such pump, then this emptying pump is with less loaded work piece, but still not effect.As result of the present invention, no-load condition and stopping state are detected, and make pump promptly be turned off, and can be turned off as fault under the situation of blocking operation.Also can advantageously determine the Fluid Volume of pumping by means of current component iq.Generally, this has produced and has reduced the benefit that noise produces, saves energy and Fault Identification.And pump is walked specific Fluid Volume, the particularly water yield clearly.Basically we can say that except the driving of pump, according to the present invention, pump also serves as transducer, to check mode of operation described expectation or that do not expect.
According to an improvement of the present invention, the loading condition of pump is by the minimal current intensity in succession and the identification of maximum current intensity of the curve of current component iq.Check such minimum-maximum curve, thereby the loading condition of pump is sensed arriving when this curve occurs.
If after loading condition is identified, surpassed the set point that the negative current of current component iq changes, then release the no-load condition of pump thus.If no-load condition is identified, then the control of the machinery of home appliances can make pump quit work, and this is because can think that fluid is pumped away fully.
Can only use the load current of current component iq to calculate integration with respect to the difference of no-load current.A preferred amount of determining the fluid of pumping by the time integral of current component iq of improving of the present invention.This amount that makes pumping walk can be determined clearly.Especially, can determine the Fluid Volume of pumping by the time integral of the difference of the variable of the variable of the current component iq under the loading condition and the current component iq under the no-load condition.
Especially, advantageously, under Unidentified no-load condition, the fluid stream that passes through pump of obstruction is discerned by the time measurement result of the operation of pump and the fact that do not reach the minimum set point of the current component iq under the loading condition.Under the situation of for example dishwasher or washing machine, this can be the discharging hose that blocks.
Particularly preferably, be used as current component through the current component iq of low-pass filtering, this is because the especially reliably information relevant with the load state of pump can be made based on low-pass filtering.
Dishwasher or washing machine pump are preferably used as pump.Described pump is emptying pump particularly, preferably the emptying pump of dishwasher or washing machine.Give the fluid send particularly liquid medium, preferably water or cleaning solution by pump.
The invention still further relates to a kind of be used to discern home appliances give the device of the load state that send pump by motor-driven fluid, described device is especially for carrying out said method, described device has the three-phase permanent excitation synchronous machine of driving pump, the field directional vector controller and the detection circuit of operation synchronous machine, and described detection circuit is determined at least a load state of pump by the current component iq of the vector controller that forms torque.
The invention still further relates to a kind of home appliances of the device of described type, particularly dishwasher or washing machine of being equipped with.
The present invention relates to a kind of have the respectively device of the above-mentioned type and home appliances, particularly dishwasher or the washing machine of pump at last.
Description of drawings
Accompanying drawing shows the present invention by means of exemplary embodiment, and accompanying drawing comprises:
Fig. 1 shows the control equivalent circuit diagram of the vector controller of the three-phase permanent excitation synchronous machine that is used for pump; And
Fig. 2 shows the current time variation diagram of the current component iq of vector controller.
Embodiment
The present invention is based on the pump of a kind of home appliances, particularly dishwasher, described pump is preferably operated as emptying pump, and is responsible for dishwasher is discharged, and in other words is used for pumping and walks with fluid, the particularly liquid crossed, is preferably water.This pump encourages synchronous machine drives by three-phase permanent, and in this exemplary embodiment, the three-phase of synchronous machine connects with hub-and-spoke configuration.This hub-and-spoke configuration forms node.Because the total current of node is zero, therefore, as long as measure the electric current of the two-phase in the three-phase.This two-phase is biphase current ia and ib.The whole three-phase system can determine by means of two phase current ia, ib.With regard to the language that uses, should be pointed out that if relate to the physics winding system, then use " the winding phase " of motor windings.On the other hand, if relate to the generation of electrical voltage system, then use term " phase ".
The directed vector controller in field is used to activate synchronous machine.For this reason, thus the position of the rotor of the speed n of the speed n pump of three-phase current system, synchronous machine and synchronous machine, particularly pole wheel angle
Be detected.Especially, in order to simplify purpose, speed n and pole wheel angle
Calculate from electric current by means of motor model.This will explain below in more detail.Therefore, below at be biphase current ia, ib in the three-phase current of measuring in the described system of the input end of control ring, and calculate three-phase current system, speed n and pole wheel angle thus by means of the motor model that forms synchronous machine
Fig. 1 shows by means of the controller equivalent electric circuit and is used for a control circuit of directed vector controller.Two winding phase current ia, ib are from comprising 120 ° the three-phase current systematic survey of electric current of interlacing each other.By means of the Park conversion with Reference numeral 1 expression, 120 ° two actual phase current ia, the ib of interlacing convert the orthogonal coordinate system of plural number, stator orientation to,, have the 90 ° of systems of two-phase that comprise current weight i α and i β this moment that is.These two current weight i α and i β are by means of the rotor angle that passes through with the Clark conversion of Reference numeral 2 expressions in the rotor coordinate system
Be rotated.Produce postrotational current component id and iq thus, wherein, id is corresponding with magnetizing current, and iq is corresponding with the electric current of the formation torque of synchronous machine.These current components id is adjusted to different desired value id and desired value iq with iq in the PI in downstream controller level 3 and 4.Carry out inverse transformation then with Reference numeral 5 expressions, and component voltage u α and u β except being used for motor model 6, described inverse transformation also is provided for the amplitude of modulator 7.Modulator 7 is a kind of elements that can produce the three-phase pulse width modulated electrical voltage system, and described three-phase pulse width modulated electrical voltage system can be conditioned aspect frequency, phase place and the amplitude.For the amplitude of component voltage u α and u β is provided, absolute value generator 8 provides at the input side of modulator 7.The rotor angle that has been mentioned to
(pole wheel angle) is not directly to measure on synchronous machine, but calculated by current weight i α and i β and component voltage u α and u β by means of motor model 6.Motor model 6 reproduces synchronous machine.Speed n is calculated by the time difference of rotor angle.This is with Reference numeral 9 expressions.The knowledge that is used for the discrete modulation step of current increment utilization of modulator 7 is calculated by speed n.Owing to can not obtain electric current and velocity information at the synchronous motor starting point, so synchronous machine starts in a controlled manner.For this reason, provide the slope model with Reference numeral 10 expressions, after specifying starting slope steepness, described slope model produces current goal speed and current increment.The desired value that is used for two current component id and iq is scheduled as fixed value.Fig. 1 comprises three switches 11,12 and 13, and each switch is in starting synchronous machine desired position respectively.In case synchronous motor starting, they just are transformed.When starting, modulator 7 operation sine tables are with the output voltage sample of the amplitude of the angle step that is used to produce the slope with slope model 10 and the current regulator that comes the self-starting desired value.Can measure phase current ia, ib whereby reliably and can calculate motor model 6 constant speed degree n really reliably if reach, then carry out the conversion from controlled operation to the adjusting operation, that is, switch 11-13 is operated, and has produced synchronous points 14 (Fig. 2).The speed regulator that is implemented as the PI controller calculates the desired value iq of the current component iq that is used to form torque 15 this moments according to the velocity deviation that exists.Magnetizing current component id is adjusted to zero.
About the measurement of phase current i α and i β, should be pointed out that these phase currents i α and i β measure by means of two by-passed resistors in the root point of the half-bridge of the U mutually of synchronous machine and V.The B6 bridge circuit particularly is provided with modulator 7.Pressure drop on described by-passed resistor is directly proportional with electric current among corresponding motor windings U and the V.Pressure drop on two by-passed resistors is adjusted to the voltage measurement scope 0V-5V of microcontroller by means of two fast amplifier circuit.Amplifier circuit is constructed in the same manner and size is selected to make and can have distortion ground to measure electric current in the pulse-width modulation net.Owing to must measure the positive and negative electric current with same magnitude in two root points, therefore, amplifier circuit has bias voltage respectively, and described bias voltage is set in the centre of possible modulation range.Corresponding bias voltage is measured in the empty load of motor process all the time, and checks its reasonability.For the influence that reduces to disturb, bias voltage filters by means of the SW low pass filter.Under the situation of irrational bias voltage, transducer software is malfunction, thereby the startup of pump is impossible.
Winding phase current ia and ib are sampled in the mode of drives interrupts, and are sampled with the pulse width modulation frequency of the pulse width modulator of transducer.Sample point is in the centre of the triggering of three downside power semiconductors of transducer.At this point, three motor windings process power semiconductors of synchronous machine are by short circuit, and the afterflow of motor windings can be measured.Because the triggering of sampling accurately is positioned at the middle place of pulse, therefore, the influence of interference is owing to pulse-width modulation switch sides (Schaltflanken) is minimized.Only an electric current once was sampled in pulse width modulation cycle.Two electric currents are measured in wrong partially mode of time by the interval pulse width modulation cycle time before calculating at motor model.Precondition at this is, in pulse width modulation cycle in the time, synchronous machine mutually in current constant.Pulse width modulation frequency is selected to this condition of realization.Electric current is surveyed with 10 analogue-to-digital converters resolution.The peak-to-peak value of phase current is described with this resolution.
The modulation of the output voltage of transducer is carried out according to question blank (LUT) method.The current angle of output voltage is stored in the phase accumulator (16), and revises once by means of the per 600 μ s circulation of control algolithm.Continue between revising at modulation angle with constant angular speed.LUT has 16 bit resolutions, and is stored in the flash memory of the controller with 256 measuring points.Pulse width modulation values upgrades when each second pulse width modulation cycle.Output voltage is corrected when each modulation value calculates by means of the intermediate circuit voltage of transducer.Therefore, the influence of the voltage fluctuation in the intermediate circuit of transducer can be compensated widely.
Because control thought of the present invention, directed vector control on the spot, therefore, the current component iq and the magnetizing current component id that form torque can directly obtain at run duration.Therefore, the load state of modulator 7 (transducer) directly reproduces by current component iq.Current component iq stands low-pass filtering (SW), is used for according to the present invention then the load state of pump is measured, and in other words is used for the load state of identification pump.
Fig. 2 shows the indicatrix of the current component iq relevant with the process that pumps of the cleaning solution/water of home appliances, particularly dishwasher.
Fig. 2 shows the current component iq of the variation of t in time of the process that pumps of the pump of operation according to the present invention.The different periods is distinguished.These periods comprise: the priming of pump period 16, have the period subsequently 17 of full width of cloth volume flow, the period subsequently 18 with volume flow of decline.Be period 19 afterwards with volume flow.In zone 20, pump is failing aspect the fluid transmission.Zone 21 identification loads, operate under load in zone 22, and operate in the process that load reduces in zone 23, and zone 24 is unloaded operation.
Below explanatory content when at every turn the resetting of pump, particularly emptying pump by re-executing unloaded identification and the identification of execution amount once more and carrying out automatically.Method of the present invention is suitable for the current curve according to the current component iq of Fig. 2.In the controlled starting process in zone 20 (Fig. 2 left side), current component iq reaches maximum M.After controlled starting, the lock in time of in Fig. 2, representing 14, the load identification of beginning pump and unloaded identification with lightening mark.After maximum current M, current component iq drops to minimum current N, and described minimum current is detected and from then on produces the positive current of determining level and changes, promptly positive diq.If this has surpassed set point V, loading condition exists, and promptly described configuration is under the load identification situation.Amount is determined to carry out this moment, promptly determines the amount by the fluid of pump pumping.For this reason, difference (iq
Load-iq
Unloaded) integration form, the Fluid Volume of this and pumping is proportional.No-load current is known according to the process that pumps before.Can be the setting value that pumps the process appointment accordingly if integration reaches, pump and carry out with a certain amount, promptly the Yu Ding water yield is pumped out.Maximum current intensity is determined in the load operation process simultaneously, and is updated continuously.The deviation of this maximum current intensity, promptly negative diq is used to discern subsequently zero load.If do not reach set point V ', pump dry running then, and then time timer is activated (unloaded secure border), after time timer stops, sets unloaded mark.Calibration measurement still can be carried out subsequently.For this reason, another timer is activated, and with the synchronous no-load running of the quilt that waits pump, and no-load current is measured after another timer stops.This is held and is used as the no-load current basis of the process that pumps subsequently.
In order to discern congestion situations, suppose that the fluid that pumps maximum from home appliances itself is no more than a certain default time in the worst case by the fluid stream of pump.The situation of this worst case allow cross section, partial blockage or the discharging hose that disconnects a little by the maximum of the height of discharging hose, foul and the fluid that will be pumped away for example the consistency of addle determine.Passing through under the low fluid rate of pump, current component iq is less in course of normal operation.If be lower than definite minimum load current and also do not identify no-load condition, infer that then discharging hose etc. gets clogged through current component iq after the maximum setting-up time.This maximum time distributes by being triggered at synchronous points 14 startup timers.Do not reach definite set point if identify the current component iq of zero load and sensing after the scheduled time of timer has passed, then the fluid stream of discharging hose of Zu Saiing and/or obstruction is identified.Load state preceding identification needn't, that is, described identification and load identification is implemented independently.
Claims (17)
1. method of giving the load state that send pump by motor-driven fluid that is used to discern home appliances, it is characterized in that, described pump is by being implemented as the permanent-magnet-field motor-driven of synchronous machine, and wherein, at least a load state of described pump is determined by the current component iq that forms torque.
2. the method for claim 1 is characterized in that, load state is determined by the curve of current component iq.
3. as arbitrary described method in the claim of front, it is characterized in that the loading condition of pump, the no-load condition of pump, the fluid stream that passes through pump of obstruction and/or the Fluid Volume of pumping are determined as load state.
4. as arbitrary described method in the claim of front, it is characterized in that the loading condition of pump is by the minimal current intensity in succession and the identification of maximum current intensity of the change procedure of current component iq.
5. as arbitrary described method in the claim of front, it is characterized in that the set point V ' identification of the negative variation that the no-load condition of pump is taken place by the electric current of current component iq after loading condition.
6. as arbitrary described method in the claim of front, it is characterized in that the Fluid Volume of pumping is determined by the time integral of current component iq.
7. as arbitrary described method in the claim of front, it is characterized in that the Fluid Volume of pumping is determined by the time integral of the difference of current component iq variable under no-load condition at variable under the loading condition and current component iq.
8. as arbitrary described method in the claim of front, it is characterized in that, under Unidentified no-load condition, the fluid stream that passes through pump of obstruction is discerned by the time measurement result of the operation of pump and the fact that do not reach the minimum set point of the current component iq under the loading condition.
9. as arbitrary described method in the claim of front, it is characterized in that, be used as current component iq through the current component iq of low-pass filtering.
10. as arbitrary described method in the claim of front, it is characterized in that wash the dishes pump or washing machine pump are as pump.
11., it is characterized in that particularly the emptying pump of dishwasher or washing machine is as pump as arbitrary described method in the claim of front.
12., it is characterized in that liquid medium, particularly water or cleaning solution are as the fluid pumping as arbitrary described method in the claim of front.
13. as arbitrary described method in the claim of front, it is characterized in that, use three phase electric machine.
14. as arbitrary described method in the claim of front, it is characterized in that, use vector controller.
15. one kind be used to discern home appliances give the device of the load state that send pump by motor-driven fluid, described device is especially for carrying out arbitrary described method in the claim of front, it is characterized in that, described device has detector circuit, and described detector circuit is determined at least a load state of pump by the current component iq that forms torque of vector controller.
16. a home appliances, particularly dishwasher or washing machine have the described device of claim 15.
17. a home appliances, particularly dishwasher or washing machine have one or more described device and pump in the claim of front.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008029910.3 | 2008-06-24 | ||
| DE102008029910.3A DE102008029910C5 (en) | 2008-06-24 | 2008-06-24 | Method for recognizing the load status of a pump |
| PCT/EP2009/057592 WO2009156326A2 (en) | 2008-06-24 | 2009-06-18 | Method for identifying the load condition of a pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102077461A true CN102077461A (en) | 2011-05-25 |
| CN102077461B CN102077461B (en) | 2015-07-29 |
Family
ID=41360521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980123790.XA Active CN102077461B (en) | 2008-06-24 | 2009-06-18 | For identifying the method for the load state of pump |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2291909B1 (en) |
| CN (1) | CN102077461B (en) |
| DE (1) | DE102008029910C5 (en) |
| PL (1) | PL2291909T3 (en) |
| RU (1) | RU2529652C2 (en) |
| WO (1) | WO2009156326A2 (en) |
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| CN106455900A (en) * | 2014-06-27 | 2017-02-22 | 伊莱克斯电器股份公司 | Dishwasher and method of operating the dishwasher |
| CN106523399A (en) * | 2015-09-15 | 2017-03-22 | 雷勃美国公司 | System and method for determining condition of fluid path |
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| CN110913740A (en) * | 2017-05-19 | 2020-03-24 | Bsh家用电器有限公司 | Water-conducting household appliance and method for operating a water-conducting household appliance |
| CN114623098A (en) * | 2020-12-08 | 2022-06-14 | 富士电机株式会社 | Pump clogging detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009035276A1 (en) * | 2009-07-29 | 2011-02-10 | Spinflow Gmbh | Control and control method for electric water pumps |
| US8793828B2 (en) | 2010-04-13 | 2014-08-05 | Whirlpool Corporation | Laundry treating appliance with automatic pump shutoff |
| DE102010028557B4 (en) * | 2010-05-04 | 2024-05-08 | BSH Hausgeräte GmbH | Dishwasher with a concentricity monitoring unit |
| DE102010028614A1 (en) * | 2010-05-05 | 2011-11-10 | BSH Bosch und Siemens Hausgeräte GmbH | Pump device and water-bearing household appliance with such |
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| CN114623098A (en) * | 2020-12-08 | 2022-06-14 | 富士电机株式会社 | Pump clogging detection system |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2291909A2 (en) | 2011-03-09 |
| DE102008029910A1 (en) | 2009-12-31 |
| EP2291909B1 (en) | 2020-05-27 |
| RU2529652C2 (en) | 2014-09-27 |
| WO2009156326A2 (en) | 2009-12-30 |
| RU2011101449A (en) | 2012-07-27 |
| WO2009156326A3 (en) | 2010-03-11 |
| PL2291909T3 (en) | 2020-11-02 |
| DE102008029910C5 (en) | 2020-03-05 |
| CN102077461B (en) | 2015-07-29 |
| DE102008029910B4 (en) | 2014-01-16 |
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